G.f.: A(x) = Sum_{n>=0} x^n * (1+x)^(2*n^2) / A(x)^n.
A321608
G.f.: A(x) = Sum_{n>=0} x^n * (1+x)^(2*n^2) / A(x)^n.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =5a(4) =22a(5) =100a(6) =581a(7) =3716a(8) =26352a(9) =203664a(10) =1688485a(11) =14922599a(12) =139579911a(13) =1374581231a(14) =14194823072a(15) =153178320198
External references
- oeis: A321608